Signal transmission method and communication device

Abstract

Disclosed in an embodiment of the present application are a signal transmission method and a communication device, the method comprising: a second terminal device sending first indication information to a first terminal device, the first indication information indicating that a first time domain resource is used for transmitting a sidelink positioning reference signal (SL-PRS) or a first signal, the SL-PRS and the first signal are mapped on a first time domain resource; and the second terminal equipment sends the SL-PRS or the first signal to the first terminal equipment on the first time domain resource based on the first indication information. Based on the method described by the application, the first terminal device and the second terminal device can determine the type of the signal needing to be transmitted on the time slot symbol in which the collision occurs.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal transmission method and a communication device. Background Art

[0002] To implement positioning technology, the terminal device is usually required to send a positioning reference signal, and then other devices measure to obtain time information or angle information, and then calculate the distance and position. For example, in uplink-based positioning technology, the network device is usually required to measure the uplink reference signal to locate the location of the terminal device. For example, the network device can measure the arrival time of the sounding reference signal (SRS) signal sent by the terminal device to locate the location of the terminal device.

[0003] In the 3rd generation partnership project (3GPP) Release 18 standard, sidelink positioning is a relatively important direction. The location of the transmitting terminal device can be determined by measuring the sidelink positioning reference signal (SL-PRS) sent by the transmitting terminal device through the receiving terminal device. Among them, the receiving terminal device can be understood as a terminal device that receives the SL-PRS, and the transmitting terminal device can be understood as a terminal device that sends the SL-PRS.

[0004] In SL communication, the transmitting terminal device also sends some other reference signals to the receiving terminal device, such as the demodulation reference signal (DMRS). Since the triggering and sending mode of SL-PRS is different from that of DMRS, SL-PRS and DMRS may be triggered at the same time and mapped to the same time slot symbol, that is, SL-PRS and DMRS collide. When SL-PRS and DMRS collide, how to transmit the signal is an urgent problem to be solved. Summary of the invention

[0005] The embodiments of the present application provide a signal transmission method and a communication device, whereby a terminal device at a transmitting end and a terminal device at a receiving end can determine the type of signal to be transmitted on a time slot symbol where a collision occurs.

[0006] In a first aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a second terminal device sends first indication information to a first terminal device, the first indication information indicating that a first time domain resource is used to transmit a sidelink positioning reference signal SL-PRS or a first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; the second terminal device sends the SL-PRS or the first signal to the first terminal device on the first time domain resource based on the first indication information.

[0007] Based on the method described in the first aspect, since the SL-PRS and the first time domain resource cannot be transmitted on the first time domain resource at the same time, after the second terminal device determines that the signal needs to be transmitted on the first time domain resource, it will send a first indication information to the first terminal device, so that the first terminal device can determine the signal to be received on the first time domain resource.

[0008] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

[0009] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

[0010] In a possible implementation, the second terminal device sends the first indication information to the first terminal device, and the specific implementation is: the second terminal device sends the side link positioning protocol SLPP signaling to the first terminal device, and the SLPP signaling carries the first indication information. By using the SLPP signaling to carry the first indication information to indicate the priority of the SL-PRS, the second terminal device can be given enough freedom to judge the importance of the positioning service and the communication service, and flexibly perform the SL-PRS priority indication, avoiding the overhead of the low-layer signaling.

[0011] In a possible implementation, the second terminal device sends the first indication information to the first terminal device, and the specific implementation is: the second terminal device sends resource pool configuration information to the first terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the first indication information. By carrying the first indication information in the resource pool configuration information, SL-PRS in different resource pools can be configured with different priorities, making the sending of SL-PRS more flexible, and both the sender and the receiver can save judgment time and shorten the detection delay of SL-PRS.

[0012] In a possible implementation, the second terminal device sends the first indication information to the first terminal device, and the specific implementation is: the second terminal device sends the side link control information SCI to the first terminal device, and the SCI carries the first indication information. By carrying the first indication information in the SCI, different priorities of SL-PRS configurations in different resource pools can be implemented, and priority indications of different SL-PRS resources in the same resource pool can be implemented, as well as the priority of the same SL-PRS resource at each transmission, that is, a more flexible SL-PRS priority indication is implemented to ensure positioning accuracy requirements or data demodulation performance requirements in different scenarios.

[0013] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0014] In one possible implementation, the first indication information indicates the priority of the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is high, the first time domain resource is used to transmit the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal.

[0015] In a possible implementation, the SL-PRS is mapped on a second time domain resource, and the second time domain resource includes the first time domain resource; when the first indication information indicates that the priority of the SL-PRS is a low priority, the second time domain resource is not used to transmit the SL-PRS.

[0016] In a possible implementation, before the second terminal device sends the first indication information to the first terminal device, the method further includes: the second terminal device receives the second indication information from the first terminal device, and the second indication information indicates that the first terminal device has the ability to support the first indication information. The second indication information can indicate whether the first terminal device has the ability to support the first indication information. If the first terminal device does not report the indication information, or reports the ability to not support the first indication information, the second terminal device will no longer send the first indication information.

[0017] In the second aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a first terminal device receives first indication information from a second terminal device, the first indication information indicates that a first time domain resource is used to transmit a sidelink positioning reference signal SL-PRS or a first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; the first terminal device receives the SL-PRS or the first signal from the second terminal device on the first time domain resource based on the first indication information. The beneficial effects corresponding to the second aspect can be found in the description corresponding to the first aspect above, and the embodiment of the present application does not limit this.

[0018] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

[0019] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

[0020] In a possible implementation manner, the first terminal device receives first indication information from the second terminal device. The specific implementation manner is: the first terminal device receives Side Link Positioning Protocol SLPP signaling from the second terminal device, and the SLPP signaling carries the first indication information.

[0021] In a possible implementation, the first terminal device receives first indication information from the second terminal device. The specific implementation is: the first terminal device receives resource pool configuration information from the second terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the first indication information.

[0022] In a possible implementation manner, the first terminal device receives first indication information from the second terminal device. The specific implementation manner is: the first terminal device receives side link control information SCI from the second terminal device, and the SCI carries the first indication information.

[0023] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0024] In one possible implementation, the first indication information indicates the priority of the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is high, the first time domain resource is used to transmit the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal.

[0025] In a possible implementation, the SL-PRS is mapped on a second time domain resource, and the second time domain resource includes the first time domain resource; when the first indication information indicates that the priority of the SL-PRS is a low priority, the second time domain resource is not used to transmit the SL-PRS.

[0026] In a possible implementation, before the first terminal device receives the first indication information from the second terminal device, the method further includes: the first terminal device sends second indication information to the second terminal device, the second indication information indicating that the first terminal device has the ability to support the first indication information.

[0027] In the third aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a second terminal device sends a third indication information to a first terminal device, the third indication information indicating the transmission of a first sidelink positioning reference signal SL-PRS; the first SL-PRS is transmitted on a third time domain resource, the third time domain resource only maps the first SL-PRS, and the first SL-PRS is one of multiple SL-PRSs in a resource configuration pool; the second terminal device sends the first SL-PRS to the first terminal device on the third time domain resource.

[0028] Based on the method described in the third aspect, the second terminal device can select a SL-PRS from multiple SL-PRSs in the resource configuration pool that will not collide with other signals for transmission, thereby avoiding signal collision of the SL-PRS and causing signal interference.

[0029] In a possible implementation manner, the third indication information indicates identification information of the first SL-PRS.

[0030] In a possible implementation manner, the second terminal device sends the third indication information to the first terminal device. The specific implementation manner is: the second terminal device sends side link control information SCI to the first terminal device, and the SCI carries the third indication information.

[0031] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0032] In one possible implementation, the method includes: the second terminal device receives third indication information from the second terminal device, the third indication information indicates the transmission of a first sidelink positioning reference signal SL-PRS; the first SL-PRS is transmitted on a third time domain resource, the third time domain resource only maps the first SL-PRS, and the first SL-PRS is one of multiple SL-PRSs in a resource configuration pool; the second terminal device receives the first SL-PRS from the second terminal device on the third time domain resource.

[0033] In a fourth aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a first terminal device receives third indication information from a second terminal device, the third indication information indicates the transmission of a first sidelink positioning reference signal SL-PRS; the first SL-PRS is transmitted on a third time domain resource, the third time domain resource only maps the first SL-PRS, and the first SL-PRS is one of multiple SL-PRSs in a resource configuration pool; the first SL-PRS is received from the second terminal device on the third time domain resource. The beneficial effects corresponding to the fourth aspect can be found in the corresponding description of the third aspect above, and the embodiment of the present application is not limited here.

[0034] In a possible implementation manner, the third indication information indicates identification information of the first SL-PRS.

[0035] In a possible implementation manner, the first terminal device receives the third indication information from the second terminal device. The specific implementation manner is: receiving side link control information SCI from the second terminal device, where the SCI carries the third indication information.

[0036] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0037] In the fifth aspect, an embodiment of the present application provides a signal transmission method, the method comprising: a second terminal device sends fourth indication information to a first terminal device, the fourth indication information indicating whether the antenna port corresponding to the first signal and the antenna port corresponding to the sidelink positioning reference signal SL-PRS are the same, and the SL-PRS and the first signal are mapped on a fourth time domain resource; the second terminal device sends the SL-PRS and the first signal to the first terminal device.

[0038] Among them, the antenna port refers to the logical port used for transmission, and there is no one-to-one correspondence with the physical antenna in definition. The same antenna port means that the channel characteristics or states are the same, while the channel states corresponding to different antenna ports are different. Therefore, when the fourth indication information indicates that the antenna port corresponding to the first signal and the antenna port corresponding to the SL-PRS are the same, the first terminal device can receive the SL-PRS based on the antenna port information corresponding to the first signal, thereby eliminating the need to further obtain and process the antenna port information corresponding to the SL-PRS, and vice versa. Therefore, based on this method, the complexity of the processing of the first terminal device can be reduced.

[0039] In one possible implementation, the first signal corresponds to a first antenna port, the SL-PRS corresponds to a second antenna port, the first antenna port includes one or more antenna ports, and the second antenna port includes one or more antenna ports; the fourth indication information indicates antenna port association information of the sidelink positioning reference signal SL-PRS and the first signal, including: the fourth indication information indicates that the first antenna port and the second antenna port are different; or, the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port.

[0040] In a possible implementation manner, the second terminal device sends fourth indication information to the first terminal device. The specific implementation manner is: the second terminal device sends Side Link Positioning Protocol SLPP signaling to the first terminal device, and the SLPP signaling carries the fourth indication information.

[0041] In a possible implementation, the second terminal device sends fourth indication information to the first terminal device. The specific implementation is: the second terminal device sends resource pool configuration information to the first terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the fourth indication information.

[0042] In a possible implementation manner, the second terminal device sends fourth indication information to the first terminal device. The specific implementation manner is: the second terminal device sends side link control information SCI to the first terminal device, and the SCI carries the fourth indication information.

[0043] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0044] In a sixth aspect, the present application provides a signal transmission method, the method comprising: a first terminal device receives fourth indication information from a second terminal device, the fourth indication information indicates antenna port association information of a sidelink positioning reference signal SL-PRS and a first signal, and the SL-PRS and the first signal are mapped on a fourth time domain resource; the first terminal device receives the SL-PRS and the first signal from the second terminal device. The sixth aspect and its corresponding beneficial effects can be found in the corresponding description of the fifth aspect above.

[0045] In one possible implementation, the first signal corresponds to a first antenna port, the SL-PRS corresponds to a second antenna port, the first antenna port includes one or more antenna ports, and the second antenna port includes one or more antenna ports; the fourth indication information indicates antenna port association information of the sidelink positioning reference signal SL-PRS and the first signal, including: the fourth indication information indicates that the first antenna port and the second antenna port are different; or, the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port.

[0046] In a possible implementation manner, the first terminal device receives fourth indication information from the second terminal device. The specific implementation manner is: the first terminal device receives Side Link Positioning Protocol SLPP signaling from the second terminal device, and the SLPP signaling carries the fourth indication information.

[0047] In a possible implementation, the first terminal device receives fourth indication information from the second terminal device. The specific implementation is: the first terminal device receives resource pool configuration information from the second terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the fourth indication information.

[0048] In a possible implementation manner, the first terminal device receives fourth indication information from the second terminal device. The specific implementation manner is: the first terminal device receives side link control information SCI from the second terminal device, and the SCI carries the fourth indication information.

[0049] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0050] In the seventh aspect, the present application provides a communication device, which may be a first terminal device or a second terminal device, or a device of the first terminal device or the second terminal device, or a device that can be used in combination with the first terminal device or the second terminal device. Among them, the communication device may also be a chip system. The communication device may execute the method described in the first aspect, the second aspect, the third aspect or the fourth aspect and any possible implementation thereof. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more units or modules corresponding to the above functions. The unit or module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the beneficial effects corresponding to the methods described in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and their possible implementations, and the repetitions will not be repeated.

[0051] In an eighth aspect, the present application provides a communication device, comprising a processor, and when the processor calls a computer program in a memory, the method described in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and its possible implementation method are executed.

[0052] In the ninth aspect, the present application provides a communication device, which includes a processor and a memory, and the processor and the memory are coupled; the processor is used to implement the method described in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and its possible implementation method.

[0053] In the tenth aspect, the present application provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method described in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and its possible implementation methods through logic circuits or execution code instructions.

[0054] In the eleventh aspect, the present application provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is executed by a communication device, it implements the method of any one of the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and its possible implementation method.

[0055] In the twelfth aspect, the present application provides a computer program product comprising instructions. When a computer reads and executes the computer program product, the computer executes the method of the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect and possible implementation methods thereof.

[0056] In the thirteenth aspect, the present application provides a communication system, which includes a first communication device and a second communication device, wherein the first communication device can be used to execute the above-mentioned first aspect, third aspect or fifth aspect and possible implementation methods, and the second communication device can be used to execute the above-mentioned second aspect, fourth aspect or sixth aspect and possible implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0058] Figure 2 It is a flowchart of a signal transmission method provided in an embodiment of the present application;

[0059] Figure 3 is a schematic diagram of a signal transmission method provided in an embodiment of the present application;

[0060] Figure 4 is a schematic diagram of another signal transmission method provided in an embodiment of the present application;

[0061] Figure 5 It is a flowchart of another signal transmission method provided in an embodiment of the present application;

[0062] Figure 6 It is a flowchart of another signal transmission method provided in an embodiment of the present application;

[0063] Figure 7 is a structural diagram of a communication device provided in an embodiment of the present application;

[0064] Figure 8 is a structural diagram of another communication device provided in an embodiment of the present application;

[0065] Fig. 9 It is a schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] The specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0067] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0068] In the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0069] In order to better understand the embodiments of the present application, the following first introduces the relevant concepts involved in the embodiments of the present application:

[0070] 1. Sidelink (SL) communication

[0071] In a wireless communication system, user equipment (UE) and UE can communicate directly without the help of network equipment. The link between UE and UE is called SL. The interface between UE and UE is called PC5 interface. A typical application scenario of SL communication is vehicle-to-everything (V2X). In the vehicle-to-everything network, each vehicle is a UE, and data can be transmitted directly between UE and UE through SL without going through the network, which can effectively reduce communication delay.

[0072] 2. Sidelink-positioning reference signal (SL-PRS)

[0073] SL-PRS is a signal that implements the positioning function in the SL scenario. The receiving terminal device can measure the arrival time of the SL-PRS sent by the sending terminal device to locate the location of the sending terminal device. Among them, the receiving terminal device can be understood as a terminal device that receives the SL-PRS, and the sending terminal device can be understood as a terminal device that sends the SL-PRS.

[0074] It has been proposed in the 3rd generation partnership project (3GPP) meeting that a dedicated resource pool (resource pool for positioning) can be defined for transmission of SL-PRS, or SL-PRS can be configured in a shared resource pool and transmitted together with data.

[0075] The following is an introduction to the system architecture involved in the embodiments of the present application:

[0076] The method provided in the present application can be applied to various communication systems, for example, an Internet of Things (IoT) system, a narrowband Internet of Things (NB-IoT) system, a long term evolution (LTE) system, a fifth-generation (5G) communication system, an LTE and 5G hybrid architecture, a 5G new radio (NR) system, and new communication systems that will emerge in the future development of communications.

[0077] Figure 1 1 is a schematic diagram of a communication system provided in an embodiment of the present application, and the solution in the present application can be applied to the communication system. The communication system includes at least two terminal devices. Figure 1Take the communication system including the first terminal device and the second terminal device as an example. Among them, the first terminal device and the second terminal device can communicate with each other through a side link. Among them, other terminal devices can also be included in the communication system, and these other terminal devices can communicate with the first terminal device and the second terminal device through a side link. The embodiment of the present application does not limit the number of terminal devices in the communication system. The first terminal device and the second terminal device can be in a state within the network coverage (In-coverage), such as a radio resource control (Radio Resource Control, RRC) connection state, an RRC idle state, an RRC inactive state, the first terminal device and the second terminal device can both be in a state outside the network coverage (out of coverage, OOC), and the first terminal device and the second terminal device can be partially within the coverage, for example, the first terminal device is in a network coverage state, and the second terminal device is in an out-of-coverage state. The first terminal device and the second terminal device can be in the same state or different states, and the embodiment of the present application does not limit the state of the first terminal device and the second terminal device.

[0078] The terminal device involved in the embodiments of the present application, which may also be referred to as a terminal, is an entity on the user side for receiving or transmitting signals. The terminal device may be a device that provides voice and / or data connectivity to a user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device may also be other processing devices connected to a wireless modem. The terminal device may communicate with a radio access network (RAN). The terminal device may also be referred to as a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a UE, etc. The terminal device may be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and / or data with a wireless access network. For example, the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), etc. Common terminal devices include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, etc., but the embodiments of the present application are not limited thereto.

[0079] SL-PRS can be configured in a shared resource pool and sent together with data, so it can be understood that SL-PRS belongs to public configuration information in the resource pool. Any terminal device using the resource pool has the same SL-PRS configuration information, and for a certain terminal device, as long as the resource pool is used, the configuration of SL-PRS is fixed. During SL communication, some other reference signals are transmitted between terminal devices, demodulation reference signal (DMRS), and DMRS can be triggered by sidelink control information (SCI). Therefore, SL-PRS and DMRS may be mapped to the same time slot symbol at the same time, that is, SL-PRS and DMRS collide. When SL-PRS and DMRS collide, how to transmit the signal is an urgent problem to be solved.

[0080] In order to determine how the terminal device transmits the signal when the SL-PRS collides with other signals, this application proposes a signal transmission method, see Figure 2 . Figure 2 FIG. 1 is a flow chart of a signal transmission method provided in an embodiment of the present application. Figure 2 As shown, the signal transmission method includes the following steps 201 and 202. Figure 2 The method shown may be executed by the first terminal device and the second terminal device, or the method may be executed by the chip in the first terminal device and the chip in the second terminal device. Figure 2 The first terminal device and the second terminal device are used as the execution subjects of the method for illustration. The embodiment of the present application does not limit the execution subjects of the signal transmission method. The first terminal device and the second terminal device can be Figure 1 The first terminal device and the second terminal device shown. Wherein:

[0081] 201. The second terminal device sends first indication information to the first terminal device. Correspondingly, the first terminal device receives the first indication information from the second terminal device, where the first indication information indicates that the first time domain resources are used to transmit SL-PRS or a first signal, and the SL-PRS and the first signal are mapped on the first time domain resources.

[0082] In an embodiment of the present application, the first time domain resource may refer to a time unit, for example, a time slot symbol, or may refer to other time domain resources of any length, which is not limited in the embodiment of the present application. The first signal is a signal that collides with the SL-PRS on the first time domain resource. The SL-PRS and the first signal are mapped on the first time domain resource, which can also be understood as the SL-PRS and the first signal colliding on the first time domain resource. Optionally, the first signal may be a DMRS, a channel state information reference signal (CSI-RS) or a phase tracking reference signal (PT-RS). Since the SL-PRS and the first signal cannot be transmitted on the first time domain resource at the same time, the second terminal device will send a first indication message to the first terminal device after determining the signal that needs to be transmitted on the first time domain resource, so that the first terminal device can determine the signal to be received on the first time domain resource. It should be noted that when the SL-PRS and the first signal collide on the first time domain resource, the signal to be transmitted on the first time domain resource can be determined by the first terminal device, or configured by the network device, or configured by a master terminal device. The master terminal device refers to a terminal device used to manage SL communications. The master terminal device can be a first terminal device, a second terminal device, and other terminal devices, and the embodiments of the present application do not limit this. Based on the method described in the present application, the first terminal device and the second terminal device can uniformly determine the type of signal to be transmitted on the time domain resource where the collision occurs.

[0083] In a possible implementation, the first indication information may indicate the following four signal transmission modes: Mode 1, the first time domain resource is used to transmit the SL-PRS, and the first signal is discarded. Mode 2, the first time domain resource is used to transmit the first signal, and the SL-PRS is discarded. Mode 3, the first time domain resource is used to transmit the first signal, and the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource. Optionally, the time domain resource positions mapped by the adjacent continuous one or more SL-PRS signals after the first time domain resource are all shifted back by one time domain resource. Mode 4, the first time domain resource is used to transmit the first signal, and the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource. Optionally, the multiple adjacent time domain resources after the first time domain resource may not need to transmit the SL-PRS, that is, the SL-PRS is not transmitted on the adjacent continuous one or more time domain resources after the first time domain resource. It should also be noted that the next adjacent time domain resource on the first time domain resource can also be understood as the adjacent time domain resource after the first time domain resource. Discarding the first signal and discarding the SL-PRS can be understood as not triggering the transmission of the first signal or SL-PRS this time, and waiting for the next triggering of the transmission of the first signal or SL-PRS.

[0084] For example, Figure 3 As shown, Figure 3 The four signal transmission methods described above are shown. In method one, the first time domain signal transmits SL-PRS, and the first signal is discarded. In method two, the first time domain resource transmits the first signal, and the SL-PRS is discarded. In method three, the first time domain resource transmits the first signal, and the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource, and the time domain resource positions mapped by the two consecutive adjacent time domain resource signals after the first time domain resource are shifted back by one time domain resource. In method three, the first time domain resource transmits the first signal, and the SL-PRS is no longer transmitted on the next adjacent time domain resource on the first time domain resource, that is, the subsequent two time domain resources are not used to transmit SL-PRS.

[0085] It should also be noted that, in addition to the signal transmission method indicated above, the first indication information may also indicate other signal transmission methods, which is not limited in the embodiments of the present application.

[0086] In a possible implementation manner, the first indication information may be provided indirectly or directly to indicate a signal transmitted on the first time domain resource.

[0087] Optionally, when the first indication information adopts an indirect indication method, the specific implementation method may be that the first indication information indicates the priority of the SL-PRS, and the signal transmitted on the first time domain resource is determined by the priority of the SL-PRS. When the first indication information indicates that the priority of the SL-PRS is high, the first time domain resource is used to transmit the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal. Among them, the SL-PRS priority can be configured by the second terminal device, or by the network device, or by a master terminal device. Among them, the second terminal device can interact with other terminal devices or network devices in advance through capability interaction information, and indicate in the capability interaction information whether the second terminal device can support the priority size of the configured SL-PRS. If the second terminal device reports the capability interaction information to indicate that the second terminal device supports the priority size of the configured SL-PRS, the priority of the SL-PRS can be configured through the network device or other terminal devices. If the second terminal device reports that it does not support the capability or does not report it, it means that the second terminal device does not want or does not support the priority of the configured SL-PRS, and the second terminal device will subsequently determine the priority of the SL-PRS itself.

[0088] Further optionally, the SL-PRS is mapped on a second time domain resource, and the second time domain resource includes the first time domain resource; when the first indication information indicates that the priority of the SL-PRS is a low priority, the second time domain resource is not used to transmit the SL-PRS.

[0089] For example, Figure 4 As shown, the SL-PRS and the first signal are both mapped on the first time domain resource, the second time domain resource includes 4 time domain resources mapped by the SL-PRS, and the second time domain resource includes the first time domain resource. When the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal, and the other resources in the second time domain resource except the first time domain resource do not collide and are no longer used to transmit the SL-PRS.

[0090] When the first indication information adopts an indirect indication method, there are three implementation methods as follows:

[0091] 1. The first indication information may be carried in a sidelink positioning protocol (SLPP) signaling, that is, the second terminal device sends an SLPP signaling to the first terminal device, and the SLPP signaling carries the first indication information.

[0092] Among them, by adding an element or field as the first indication information in the SLPP signaling, the priority of the SL-PRS in this positioning process is indicated. When the second terminal device determines that the SL-PRS and the first signal collide, if the priority of the SL-PRS is high, the second terminal device should map the SL-PRS on the first time domain resource where the collision occurs. After the first terminal device receives the first indication information in the SLPP, it determines that the SL-PRS should be received on the first time domain resource. If the priority of the SL-PRS is low, the second terminal device should map the first signal on the first time domain resource where the collision occurs. After the first terminal device receives the first indication information in the SLPP signaling, it determines that the first signal should be received on the first time domain resource.

[0093] Before the first terminal device receives the SLPP configuration information, the first terminal device will first obtain the resource pool configuration information. The resource pool configuration information may be sent by the first terminal device, or by the network device, or by a master terminal device. The resource pool configuration information includes the configuration information of the SL-PRS, wherein the configuration information of the SL-PRS may include the number of symbols of the SL-PRS, the comb size of the SL-PRS, and the position or offset value of the default starting symbol, the position or offset value of the default starting resource element (RE) or subcarrier, and one or more of the above information. The SL-PRS configured in the resource pool configuration information is not necessarily sent by the second terminal device to the first terminal device, but may be configured in advance, or uniformly configured by the network device, or configured by a master terminal device. The embodiment of the present application does not limit the configuration process of the resource pool. Among them, the second terminal device can be configured with multiple resource pools, each resource pool includes an SL-PRS configuration, and the second terminal device sends SL-PRS through any one of the multiple resource pools, and its priority is determined according to the SL-PRS priority indicated by the first indication information carried in the SLPP signaling.

[0094] By using SLPP signaling to carry the first indication information to indicate the priority of SL-PRS, the second terminal device can be given enough freedom to judge the importance of positioning services and communication services, and flexibly perform SL-PRS priority indication to avoid the overhead of low-layer signaling.

[0095] 2. The first indication information may be carried in the resource pool configuration information, that is, the second terminal device sends the resource pool configuration information to the first terminal device, the resource pool configuration information includes the configuration information of the SL-PRS, and the resource pool configuration information carries the first indication information.

[0096] Among them, a new field can be added in the configuration information of the resource pool as the first indication information to indicate the priority of the SL-PRS in this positioning process. Exemplarily, the following code is a method for configuring a resource pool:

[0097] SL-ResourcePool-r16::=SEQUENCE{

[0098] sl-PSCCH-Config-r16SetupRelease{SL-PSCCH-Config-r16}OPTIONAL,--Need M

[0099] sl-PSSCH-Config-r16SetupRelease{SL-PSSCH-Config-r16}OPTIONAL,--Need M

[0100] sl-PSFCH-Config-r16SetupRelease{SL-PSFCH-Config-r16}OPTIONAL,--Need M

[0101] sl-SyncAllowed-r16SL-SyncAllowed-r16 OPTIONAL,--Need M

[0102] …

[0103] sl-PRS-priority-r18 ENUMERATE D{high,low}OPTIONAL,or

[0104] The sl-PRS-priority-r18 in the above field is a newly added field, and the value of this field is {high, low}. If this field is set to "high", it means that the SL-PRS in the resource pool has a high priority. If a collision occurs, the terminal device should prioritize mapping or sending the SL-PRS; if this field is set to "low", it means that the SL-PRS in the resource pool has a low priority. If a collision occurs between the SL-PRS and the first signal, the terminal device should prioritize transmitting the first signal.

[0105] By carrying the first indication information in the resource pool configuration information, SL-PRS in different resource pools can be configured with different priorities, making the transmission of SL-PRS more flexible, and enabling both the sender and receiver to save judgment time and shorten the detection delay of SL-PRS.

[0106] 3. The first indication information may be carried in the SCI, that is, the second terminal device sends the SCI to the first terminal device, and the SCI carries the first indication information.

[0107] Among them, the SCI transmitted by the second terminal device and the first terminal device can be a multi-level SCI. Taking the two-level SCI as an example, the first-level SCI carries the scheduling information of the corresponding physical sidelink control channel (PysicalSidelink Control Channel, PSSCH) and the information of the second-level SCI, such as the frequency domain resource position of PSSCH, the time domain resource position, the modulation and coding scheme, the DMRS pattern, etc. The first indication information can be carried in the first-level SCI or the second-level SCI. Specifically, the reserved field in the first-level SCI or the newly added field in the second-level SCI can be used to indicate the priority of the SL-PRS.

[0108] Taking the first indication information carried in the first-level SCI as an example, the reserved field in the first-level SCI can be used to indicate the priority of the SL-PRS. For example, there is a reserved bit in SCI format 1-A, and the length of the reserved bit is between 2 bits and 4 bits. One bit of the reserved bit can be used to indicate the priority of the SL-PRS in the first time domain resource currently scheduled. If the bit value is set to "0", indicating that the priority of the SL-PRS is low priority, the first terminal device receives the first signal on the first time domain resource; if the bit value is set to "1", indicating that the priority of the SL-PRS is high priority, the first terminal device receives the SL-PRS on the first time domain resource.

[0109] By carrying the first indication information in the SCI, different priorities of SL-PRS configurations in different resource pools can be achieved. It is also possible to achieve priority indication of different SL-PRS resources in the same resource pool, as well as the priority of the same SL-PRS resource at each transmission. This means that a more flexible SL-PRS priority indication is achieved to ensure positioning accuracy requirements or data demodulation performance requirements in different scenarios.

[0110] Among them, the first indication information can adopt a direct indication method, and the specific implementation method can be to correspond the multiple signal transmission methods to an option number respectively, and determine the signal transmission method according to the number indicated in the first indication information. Optionally, the signal transmission method may include one or more of the four methods described above, that is, method 1, the first time domain resource is used to transmit SL-PRS, and the first signal is discarded. Method 2, the first time domain resource is used to transmit the first signal, and the SL-PRS is discarded. Method 3, the first time domain resource is used to transmit the first signal, and the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource. Method 4, the first time domain resource is used to transmit the first signal, and the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

[0111] In this manner, the first indication information can be carried in the SCI, that is, the second terminal device sends the SCI to the first terminal device, and the SCI carries the first indication information. Optionally, the SCI can be a first-level SCI or a second-level SCI. Specifically, the priority of the SL-PRS can be indicated by using a reserved field in the first-level SCI or a newly added field in the second-level SCI.

[0112] Taking the first indication information carried in the first-level SCI as an example, the reserved field in the first-level SCI can be used to indicate the priority of the SL-PRS. There are reserved bits in SCI format 1-A, and the length of the reserved bits may be between 2 bits and 4 bits. Two bits of them can be used to indicate the behavior options of the SL-PRS in the currently scheduled time slot, for example, "00" indicates the signal transmission mode of method one described above, "01" indicates the signal transmission mode of method two described above, "10" indicates the signal transmission mode of method three described, and "11" indicates the signal transmission mode of method four described.

[0113] By predefining different behaviors of terminal devices and adding indication information of terminal device behaviors in low-layer signaling, the priority effect can be implicitly achieved without introducing explicit priority indication information. The second terminal device can flexibly determine or modify the sending behavior of SL-PRS to ensure positioning accuracy requirements or data demodulation performance requirements in different scenarios.

[0114] In a possible implementation, before the second terminal device sends the first indication information to the first terminal device, the method further includes: the second terminal device receives the second indication information from the first terminal device, and the second indication information indicates that the first terminal device has the ability to support the first indication information. The second indication information can indicate whether the first terminal device has the ability to support the first indication information. If the first terminal device does not report the indication information, or reports the ability to not support the first indication information, the second terminal device will no longer send the first indication information.

[0115] 202. The second terminal device sends a SL-PRS or a first signal to the first terminal device on the first time domain resource based on the first indication information. Correspondingly, the first terminal device receives the SL-PRS or the first signal from the first terminal device on the first time domain resource.

[0116] In an embodiment of the present application, the first indication information indicates the transmission mode of the signal, and the second terminal device will send a signal based on the transmission mode of the signal, and the first terminal device will also receive the signal based on the transmission mode of the signal. Since the SL-PRS and the first signal collide on the first time domain resource, after the second terminal device determines the signal that needs to be transmitted on the first time domain resource, the first indication information enables the first terminal device to determine the signal to be received on the first time domain resource. Based on the method described in the present application, the first terminal device and the second terminal device can uniformly determine the type of signal to be transmitted on the time domain resource where the collision occurs.

[0117] Since SL-PRS may collide with other signals, in order to avoid collision between SL-PRS and other signals, this application proposes a signal transmission method, see Figure 5 . Figure 5 FIG. 1 is a flow chart of a signal transmission method provided in an embodiment of the present application. Figure 5 As shown, the signal transmission method includes the following steps 501 and 502. Figure 5 The method shown may be executed by the first terminal device and the second terminal device, or the method may be executed by the chip in the first terminal device and the chip in the second terminal device. Figure 5 The first terminal device and the second terminal device are used as the execution subjects of the method for illustration. The embodiment of the present application does not limit the execution subjects of the signal transmission method. The first terminal device and the second terminal device can be Figure 1 The first terminal device and the second terminal device shown. Wherein:

[0118] 501. The second terminal device sends third indication information to the first terminal device. Correspondingly, the second terminal device receives third indication information from the first terminal device, where the third indication information indicates the transmission of the first SL-PRS. The first SL-PRS is transmitted on a third time domain resource. The third time domain resource only maps the first SL-PRS. The first SL-PRS is one of multiple SL-PRSs in the resource configuration pool.

[0119] 502. The second terminal device sends a first SL-PRS to the first terminal device on the third time domain resources. Correspondingly, the first terminal device receives the first SL-PRS from the first terminal device on the third time domain resources.

[0120] In an embodiment of the present application, before the second terminal device sends a signal to the first terminal device, the first terminal device will obtain the resource pool configuration information in advance, and the resource pool configuration information includes the configuration information of multiple SL-PRS in the resource configuration pool. The resource pool configuration information may be sent by the first terminal device, or by a network device, or by a master terminal device. In the resource pool configuration information, a resource pool may include configuration information corresponding to multiple SL-PRSs, and the configuration information includes one or more of the number of SL-PRS symbols, the comb size of the SL-PRS, the position or offset value of the default starting symbol, the position or offset value of the default starting RE or subcarrier, etc.

[0121] Exemplarily, two SL-PRSs are configured in a resource configuration pool, namely a first SL-PRS and a second SL-PRS, wherein the identifier of the first SL-PRS is 1, and the identifier of the second SL-PRS is 2. The starting symbol position of the first SL-PRS is 2, the number of symbols is 2, and the combsize is 2. The starting symbol position of the second SL-PRS is 4, the number of symbols is 2, and the combsize is 2. The second terminal device can select a SL-PRS from the first SL-PRS and the second SL-PRS that will not collide with other signals for transmission according to the situation.

[0122] Among them, the first SL-PRS indicated by the third indication information is mapped on the third time domain resource, and the third time domain resource only maps the first SL-PRS, which can be understood as that the third time domain resource is not mapped by other signals, that is, no signal collision will occur on the third time domain resource. Optionally, the third indication information indicates the identifier of the first SL-PRS. Among them, the other signal can be DMRS, CSI-RS or PTRS.

[0123] By adopting this method, the second terminal device can select a SL-PRS from multiple SL-PRSs in the resource configuration pool that will not collide with other signals for transmission, thereby avoiding signal collision of the SL-PRS and signal interference.

[0124] In a possible implementation, the third indication information may be carried in an SCI, that is, the second terminal device sends an SCI to the first terminal device, and the SCI carries the third indication information. Optionally, the SCI may be a first-level SCI or a second-level SCI.

[0125] Taking the first indication information as being carried in the first-level SCI as an example, a reserved field in the first-level SCI may be used to indicate the first SL-PRS, for example, to indicate an identifier of the first SL-PRS.

[0126] When SL-PRS and other signals are transmitted in the same time slot, the terminal device needs to obtain the antenna ports used by the SL-PRS and other signals respectively for processing when receiving the signal, which may lead to high processing complexity. In order to reduce the processing complexity of the terminal device in this scenario, the embodiment of the present application proposes a signal transmission method, such as Figure 6 As shown, the signal transmission method includes the following steps 601 and 602. Figure 6 The method shown may be executed by the first terminal device and the second terminal device, or the method may be executed by the chip in the first terminal device and the chip in the second terminal device. Figure 6 The first terminal device and the second terminal device are used as the execution subjects of the method for illustration. The embodiment of the present application does not limit the execution subjects of the signal transmission method. The first terminal device and the second terminal device can be Figure 1 The first terminal device and the second terminal device are shown.

[0127] 601. The second terminal device sends fourth indication information to the first terminal device. Correspondingly, the first terminal device receives fourth indication information from the second terminal device. The fourth indication information indicates antenna port association information of the SL-PRS and the first signal. The SL-PRS and the first signal are mapped on fourth time domain resources.

[0128] 602. The second terminal device sends the SL-PRS and the first signal to the first terminal device. Correspondingly, the first terminal device receives the SL-PRS and the first signal from the second terminal device.

[0129] In an embodiment of the present application, the fourth time domain resource may refer to a time unit, for example, a time slot symbol, or may refer to other time domain resources of any length, which is not limited in the embodiment of the present application. The SL-PRS and the first signal are mapped on the fourth time domain resource, which can also be understood as that both the SL-PRS and the first signal need to be transmitted on the fourth time domain resource. Optionally, the first signal may be DMRS, CSI-RS or PTRS. The antenna port association information of the SL-PRS and the first signal includes whether the antenna port corresponding to the first signal and the antenna port corresponding to the SL-PRS are the same. The antenna port corresponding to the first signal and the antenna port corresponding to the SL-PRS can be further understood as the antenna port used by the first signal and the antenna port used by the SL-PRS, or the antenna port associated with the first signal and the antenna port associated with the SL-PRS. Among them, the antenna port refers to a logical port used for transmission, and there is no one-to-one correspondence in definition with the physical antenna. The same antenna port means that the channel characteristics or states are the same, while the channel characteristics or channel states corresponding to different antenna ports are different. Therefore, when the fourth indication information indicates that the antenna port corresponding to the first signal and the antenna port corresponding to the SL-PRS are the same, the first terminal device can receive the SL-PRS based on the antenna port information corresponding to the first signal, thereby eliminating the need to further obtain and process the antenna port information corresponding to the SL-PRS, and vice versa. Therefore, based on this method, the complexity of processing by the first terminal device can be reduced.

[0130] Among them, the first signal and SL-PRS can both correspond to one or more antenna ports. Specifically, the first signal corresponds to the first antenna port, and the SL-PRS corresponds to the second antenna port. The first antenna port includes one or more antenna ports, and the second antenna port includes one or more antenna ports.

[0131] The fourth indication information indicates the antenna port association information of the SL-PRS and the first signal, specifically including: the fourth indication information indicates that the first antenna port and the second antenna port are different; or the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port. The fourth indication information indicates that the first antenna port and the second antenna port are different, that is, any antenna port in the first antenna port is different from the antenna port in the second antenna port, and there is no identical antenna port in the first antenna port and the second antenna port. The fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port, and may further include that the fourth indication information indicates that the first antenna port and the second antenna port are exactly the same, and the fourth indication information indicates that some antenna ports included in the first antenna port and the second antenna port are the same.

[0132] For example, it is assumed that the first antenna port includes antenna port 1 and antenna port 2, and the second antenna port includes antenna port 3, that is, the first antenna port and the second antenna port are different. For another example, it is assumed that the first antenna port includes antenna port 1, and the second antenna port includes antenna port 1, that is, the first antenna port and the second antenna port are exactly the same. For another example, it is assumed that the first antenna port includes antenna port 1 and antenna port 2, and the second antenna port includes antenna port 1, the antenna port 1 included in the first antenna port and the second antenna port is the same, but the second antenna port does not include antenna port 2, that is, some of the antenna ports included in the first antenna port and the second antenna port are the same.

[0133] It should also be noted that when the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port, the fourth indication information may specifically indicate that a specific antenna port in the first antenna port is the same as a specific antenna port in the second antenna port. For example, the first antenna port includes antenna port 1 and antenna port 2, and the second antenna port includes antenna port 1. When the fourth indication information indicates that some antenna ports included in the first antenna port and the second antenna port are the same, it will specifically indicate that antenna port 1 in the first antenna port and the second antenna port is the same.

[0134] The fourth indication information may be carried in different signalings, and specifically may include the following implementation methods.

[0135] In a possible implementation, the fourth indication information may be carried in the SCI, that is, the second terminal device sends the SCI to the first terminal device, and the SCI carries the fourth indication information.

[0136] Among them, the SCI transmitted by the second terminal device and the first terminal device can be a multi-level SCI. Taking the two-level SCI as an example, the first-level SCI carries the corresponding PSSCH scheduling information and the second-level SCI information, such as the frequency domain resource position, time domain resource position, modulation and coding scheme, DMRS pattern, etc. of the PSSCH. The fourth indication information can be carried in the first-level SCI or the second-level SCI. Specifically, the reserved field in the first-level SCI or the newly added field in the second-level SCI can be used to carry the fourth indication information.

[0137] Taking the fourth indication information carried in the first-level SCI as an example, the reserved field in the first-level SCI is used to indicate that there are reserved bits in SCI format 1-A, and the length of the reserved bits may be between 2 bits and 4 bits, and 2 bits thereof can be used to indicate. Exemplarily, assuming that the SL-PRS signal corresponds to one antenna port and the first signal corresponds to two antenna ports, when the 2 bits in the reserved field are "00", it indicates that the antenna port corresponding to the SL-PRS is different from any of the two antenna ports corresponding to the first signal, "01" indicates that the antenna port corresponding to the SL-PRS is the same as the first antenna port of the two antenna ports corresponding to the first signal, and "10" indicates that the antenna port corresponding to the SL-PRS is the same as the second antenna port of the two antenna ports corresponding to the first signal.

[0138] In a possible implementation, the fourth indication information may be carried in the resource pool configuration information, that is, the second terminal device sends the resource pool configuration information to the first terminal device, the resource pool configuration information includes the configuration information of the SL-PRS, and the resource pool configuration information carries the fourth indication information. Among them, a new field may be added to the configuration information of the resource pool as the fourth indication information, and the specific implementation method is the same as the example described above in which the fourth indication information is carried in the SCI.

[0139] In a possible implementation, the fourth indication information may be carried in SLPP signaling, that is, the second terminal device sends SLPP signaling to the first terminal device, and the SLPP signaling carries the fourth indication information. Among them, a new field may be added to the SLPP signaling as the fourth indication information, and the specific implementation method is the same as the example described above in which the fourth indication information is carried in the SCI.

[0140] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device may be a terminal device or a device having the function of a terminal device (eg, a chip). Figure 7 As shown, the communication device 70 may include a sending unit 701 and a receiving unit 702. Optionally, the communication device 70 may also include a processing unit. The communication device may execute the relevant steps of the second terminal device in the aforementioned method embodiment.

[0141] In one embodiment:

[0142] The sending unit 701 is used to send first indication information to the first terminal device, the first indication information indicating that the first time domain resource is used to transmit the sidelink positioning reference signal SL-PRS or the first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; the sending unit 701 is also used to send the SL-PRS or the first signal to the first terminal device on the first time domain resource based on the first indication information.

[0143] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

[0144] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

[0145] In a possible implementation, when the sending unit 701 sends the first indication information to the first terminal device, it is specifically used to: send a Side Link Positioning Protocol SLPP signaling to the first terminal device, where the SLPP signaling carries the first indication information.

[0146] In a possible implementation, when the sending unit 701 sends the first indication information to the first terminal device, it is specifically used to: send resource pool configuration information to the first terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the first indication information.

[0147] In a possible implementation, when the sending unit 701 sends the first indication information to the first terminal device, it is specifically used to: send side link control information SCI to the first terminal device, where the SCI carries the first indication information.

[0148] In a possible implementation, the SCI is a first-level SCI or a second-level SCI.

[0149] In one possible implementation, the first indication information indicates the priority of the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is high, the first time domain resource is used to transmit the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal.

[0150] In one possible implementation, the SL-PRS is mapped on a second time domain resource, and the second time domain resource includes the first time domain resource; when the first indication information indicates that the priority of the SL-PRS is a low priority, the second time domain resource is not used to transmit the SL-PRS.

[0151] In one possible implementation, the sending unit 701 is used to send the first indication information to the first terminal device before the receiving unit 702 is used to receive the second indication information from the first terminal device, and the second indication information indicates that the first terminal device has the ability to support the first indication information.

[0152] In yet another embodiment:

[0153] The sending unit 701 is used to send third indication information to the first terminal device, the third indication information indicates the transmission of the first sidelink positioning reference signal SL-PRS; the first SL-PRS is transmitted on the third time domain resource, the third time domain resource only maps the first SL-PRS, and the first SL-PRS is one of multiple SL-PRSs in the resource configuration pool; the sending unit 701 is also used to send the first SL-PRS to the first terminal device on the third time domain resource.

[0154] In a possible implementation manner, the third indication information indicates identification information of the first SL-PRS.

[0155] In a possible implementation, when the sending unit 701 sends the third indication information to the first terminal device, it is specifically used to: send side link control information SCI to the first terminal device, where the SCI carries the third indication information.

[0156] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0157] In yet another embodiment:

[0158] The sending unit 701 is used to send fourth indication information to the first terminal device, where the fourth indication information indicates whether the antenna port corresponding to the first signal and the antenna port corresponding to the sidelink positioning reference signal SL-PRS are the same, and the SL-PRS and the first signal are mapped on a fourth time domain resource; the sending unit 701 is also used to send the SL-PRS and the first signal to the first terminal device.

[0159] In one possible implementation, the first signal corresponds to a first antenna port, the SL-PRS corresponds to a second antenna port, the first antenna port includes one or more antenna ports, and the second antenna port includes one or more antenna ports; the fourth indication information indicates antenna port association information of the sidelink positioning reference signal SL-PRS and the first signal, including: the fourth indication information indicates that the first antenna port and the second antenna port are different; or, the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port.

[0160] In a possible implementation, when the sending unit 701 sends the fourth indication information to the first terminal device, it is specifically used to send a side link positioning protocol SLPP signaling to the first terminal device, and the SLPP signaling carries the fourth indication information.

[0161] In a possible implementation, the sending unit 701 sends fourth indication information to the first terminal device, which is specifically used to send resource pool configuration information to the first terminal device, where the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the fourth indication information.

[0162] In a possible implementation, when the sending unit 701 sends the fourth indication information to the first terminal device, it is specifically used to send sidelink control information SCI to the first terminal device, and the SCI carries the fourth indication information.

[0163] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0164] in, Figure 7 The communication device in the embodiment can also execute the relevant steps of the first terminal device in the aforementioned method embodiment.

[0165] In one embodiment:

[0166] The receiving unit 702 is used to receive first indication information from the second terminal device, the first indication information indicating that the first time domain resource is used to transmit the sidelink positioning reference signal SL-PRS or the first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; the receiving unit 702 is also used to receive the SL-PRS or the first signal from the second terminal device on the first time domain resource based on the first indication information.

[0167] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

[0168] In a possible implementation manner, when the first indication information indicates that the first time domain resource is used to transmit the first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

[0169] In a possible implementation, the receiving unit 702 receives the first indication information from the second terminal device, and is specifically used to: receive a side link positioning protocol SLPP signaling from the second terminal device, where the SLPP signaling carries the first indication information.

[0170] In a possible implementation, the receiving unit 702 receives first indication information from the second terminal device, and is specifically used to: receive resource pool configuration information from the second terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the first indication information.

[0171] In a possible implementation, the receiving unit 702 receives the first indication information from the second terminal device, and is specifically used to: receive side link control information SCI from the second terminal device, where the SCI carries the first indication information.

[0172] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0173] In one possible implementation, the first indication information indicates the priority of the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is high, the first time domain resource is used to transmit the SL-PRS; when the first indication information indicates that the priority of the SL-PRS is low, the first time domain resource is used to transmit the first signal.

[0174] In a possible implementation, the SL-PRS is mapped on a second time domain resource, and the second time domain resource includes the first time domain resource; when the first indication information indicates that the priority of the SL-PRS is a low priority, the second time domain resource is not used to transmit the SL-PRS.

[0175] In a possible implementation, before the receiving unit 702 receives the first indication information from the second terminal device, the sending unit 701 is used to send second indication information to the second terminal device, where the second indication information indicates that the first terminal device has the ability to support the first indication information.

[0176] In yet another embodiment:

[0177] The receiving unit 702 is used to receive third indication information from the second terminal device, the third indication information indicates the transmission of a first sidelink positioning reference signal SL-PRS; the first SL-PRS is transmitted on a third time domain resource, the third time domain resource only maps the first SL-PRS, and the first SL-PRS is one of multiple SL-PRSs in the resource configuration pool; the receiving unit 702 is also used to receive the first SL-PRS from the second terminal device on the third time domain resource.

[0178] In a possible implementation manner, the third indication information indicates identification information of the first SL-PRS.

[0179] In a possible implementation, when the receiving unit 702 receives the third indication information from the second terminal device, it is specifically used to: receive side link control information SCI from the second terminal device, where the SCI carries the third indication information.

[0180] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0181] In yet another embodiment:

[0182] The receiving unit 702 is used to receive fourth indication information from the second terminal device, the fourth indication information indicates antenna port association information of the sidelink positioning reference signal SL-PRS and the first signal, and the SL-PRS and the first signal are mapped on the fourth time domain resource; the receiving unit 702 is also used to receive the SL-PRS and the first signal from the second terminal device.

[0183] In one possible implementation, the first signal corresponds to a first antenna port, the SL-PRS corresponds to a second antenna port, the first antenna port includes one or more antenna ports, and the second antenna port includes one or more antenna ports; the fourth indication information indicates antenna port association information of the sidelink positioning reference signal SL-PRS and the first signal, including: the fourth indication information indicates that the first antenna port and the second antenna port are different; or, the fourth indication information indicates that one or more antenna ports in the first antenna port are the same as one or more antenna ports in the second antenna port.

[0184] In a possible implementation, when the receiving unit 702 receives the fourth indication information from the second terminal device, it is specifically used to receive a side link positioning protocol SLPP signaling from the second terminal device, and the SLPP signaling carries the fourth indication information.

[0185] In a possible implementation, when the receiving unit 702 receives the fourth indication information from the second terminal device, it is specifically used to receive resource pool configuration information from the second terminal device, the resource pool configuration information includes SL-PRS configuration information, and the resource pool configuration information carries the fourth indication information.

[0186] In a possible implementation, when the receiving unit 702 receives the fourth indication information from the second terminal device, it is specifically used to receive side link control information SCI from the second terminal device, and the SCI carries the fourth indication information.

[0187] In a possible implementation manner, the SCI is a first-level SCI or a second-level SCI.

[0188] Figure 8A structural diagram of another communication device is given. The communication device 800 may be the first terminal device in the above method embodiment, or may be a chip, a chip system, or a processor that supports the first terminal device to implement the above method. The communication device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0189] Alternatively, the communication device 800 may be the second terminal device in the above method embodiment, or may be a chip, a chip system, or a processor that supports the second terminal device to implement the above method. The communication device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0190] The communication device 800 may include one or more processors 801. The processor 801 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal, a terminal chip, a DU or a CU, etc.), execute a software program, and process the data of the software program.

[0191] Optionally, the communication device 800 may include one or more memories 802, on which instructions 804 may be stored, and the instructions may be executed on the processor 801, so that the communication device 800 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 802. The processor 801 and the memory 802 may be provided separately or integrated together.

[0192] Optionally, the communication device 800 may further include a transceiver 805 and an antenna 806. The transceiver 805 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 805 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

[0193] The communication device 800 is a first terminal device: the processor 801 is used to perform the data processing operation of the first terminal device in the above method embodiment. The transceiver 805 is used to perform the data transceiving operation of the first terminal device in the above method embodiment.

[0194] Alternatively, the communication device 800 is a second network device: the processor 801 is used to perform the data processing operation of the second network device in the above method embodiment. The transceiver 805 is used to perform the data transceiving operation of the second network device in the above method embodiment.

[0195] In another possible design, the processor 801 may include a transceiver for implementing the receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0196] In another possible design, optionally, the processor 801 may store an instruction 803, and the instruction 803 runs on the processor 801, so that the communication device 800 can execute the method described in the above method embodiment. The instruction 803 may be solidified in the processor 801, in which case the processor 801 may be implemented by hardware.

[0197] In another possible design, the communication device 800 may include a circuit that can implement the functions of sending or receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in the embodiments of the present application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc.

[0198] The communication device described in the above embodiments may be a first terminal device or a second terminal device, but the scope of the communication device described in the embodiments of the present application is not limited thereto, and the structure of the communication device may not be limited thereto. Figure 8 The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0199] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0200] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and instructions;

[0201] (3) ASIC, such as modem (Mobile Station Modem, MSM);

[0202] (4) Modules that can be embedded in other devices;

[0203] (5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0204] (6)Others

[0205] For the case where the communication device may be a chip or a chip system, see Fig. 9 Schematic diagram of the chip structure shown. Fig. 9 The chip shown includes a processor 901 and an interface 902. Optionally, it may also include a memory 903. The number of the processors 901 may be one or more, and the number of the interfaces 902 may be multiple.

[0206] In one design, for a case where the chip is used to implement the function of the first terminal device in an embodiment of the present application:

[0207] The interface 902 is used to input or output signals;

[0208] The processor 901 is used to execute the data processing operation of the first terminal device in the above method embodiment.

[0209] In another design, for the case where the chip is used to implement the function of the second terminal device in the embodiment of the present application:

[0210] The interface 902 is used to input or output signals;

[0211] The processor 901 is used to execute the data processing operation of the second terminal device in the above method embodiment.

[0212] It is understandable that some optional features in the embodiments of the present application may be implemented independently in certain scenarios without relying on other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to needs in certain scenarios. Accordingly, the communication device provided in the embodiments of the present application may also implement these features or functions accordingly, which will not be described in detail here.

[0213] It should be understood that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an ASIC, a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0214] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0215] The present application also provides a computer-readable medium for storing computer software instructions, which, when executed by a communication device, implement the functions of any of the above method embodiments.

[0216] The present application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the functions of any of the above method embodiments.

[0217] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state drive (SSD)).

[0218] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

Claims

1. A signal transmission method, characterized in that: The method comprises: Sending first indication information to a first terminal device, where the first indication information indicates that a first time domain resource is used to transmit a sidelink positioning reference signal SL-PRS or a first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; Based on the first indication information, an SL-PRS or a first signal is sent to the first terminal device on the first time domain resource.

2. The method according to claim 1, characterized in that: When the first indication information indicates that the first time domain resource is used to transmit a first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

3. The method according to claim 1, characterized in that When the first indication information indicates that the first time domain resource is used to transmit a first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

4. The method according to any one of claims 1 to 3, characterized in that: The sending the first indication information to the first terminal device includes: A Side Link Positioning Protocol SLPP signaling is sent to the first terminal device, wherein the SLPP signaling carries the first indication information.

5. The method according to any one of claims 1 to 3, characterized in that: The sending the first indication information to the first terminal device includes: Send resource pool configuration information to the first terminal device, the resource pool configuration information including the configuration information of the SL-PRS, and the resource pool configuration information carries the first indication information.

6. The method according to any one of claims 1 to 3, characterized in that: The sending the first indication information to the first terminal device includes: Send side link control information SCI to the first terminal device, where the SCI carries the first indication information.

7. The method according to claim 6, characterized in that The SCI is a first-level SCI or a second-level SCI.

8. The method according to any one of claims 1 to 7, characterized in that: The first indication information indicates the priority of the SL-PRS; When the first indication information indicates that the priority of the SL-PRS is a high priority, the first time domain resource is used to transmit the SL-PRS; When the first indication information indicates that the priority of the SL-PRS is a low priority, the first time domain resource is used to transmit the first signal.

9. The method according to claim 8, characterized in that The SL-PRS is mapped on the second time domain resources, and the second time domain resources include the first time domain resources; When the first indication information indicates that the priority of the SL-PRS is low priority, the second time domain resource is not used to transmit the SL-PRS.

10. The method according to any one of claims 1 to 9, characterized in that: Before sending the first indication information to the first terminal device, the method further includes: Receive second indication information from the first terminal device, where the second indication information indicates that the first terminal device has the ability to support the first indication information.

11. A signal transmission method, characterized in that: The method comprises: Receive first indication information from a second terminal device, where the first indication information indicates that a first time domain resource is used to transmit a sidelink positioning reference signal SL-PRS or a first signal, and the SL-PRS and the first signal are mapped on the first time domain resource; Based on the first indication information, the SL-PRS or the first signal from the second terminal device is received on the first time domain resource.

12. The method according to claim 11, characterized in that When the first indication information indicates that the first time domain resource is used to transmit a first signal, the SL-PRS is transmitted on the next adjacent time domain resource on the first time domain resource.

13. The method according to claim 11, characterized in that When the first indication information indicates that the first time domain resource is used to transmit a first signal, the SL-PRS is not transmitted on the next adjacent time domain resource on the first time domain resource.

14. The method according to any one of claims 11 to 13, characterized in that: The receiving first indication information from the second terminal device includes: A Side Link Positioning Protocol SLPP signaling is received from a second terminal device, wherein the SLPP signaling carries the first indication information.

15. The method according to any one of claims 11 to 13, characterized in that: The receiving first indication information from the second terminal device includes: Receive resource pool configuration information from a second terminal device, the resource pool configuration information including configuration information of the SL-PRS, and the resource pool configuration information carries the first indication information.

16. The method according to any one of claims 11 to 13, characterized in that: The receiving first indication information from the second terminal device includes: Receive side link control information SCI from a second terminal device, wherein the SCI carries the first indication information.

17. The method according to claim 16, characterized in that The SCI is a first-level SCI or a second-level SCI.

18. The method according to any one of claims 11 to 17, characterized in that: The first indication information indicates the priority of the SL-PRS; When the first indication information indicates that the priority of the SL-PRS is a high priority, the first time domain resource is used to transmit the SL-PRS; When the first indication information indicates that the priority of the SL-PRS is a low priority, the first time domain resource is used to transmit the first signal.

19. The method according to claim 18, characterized in that The SL-PRS is mapped on the second time domain resources, and the second time domain resources include the first time domain resources; When the first indication information indicates that the priority of the SL-PRS is low priority, the second time domain resource is not used to transmit the SL-PRS.

20. The method according to any one of claims 11 to 19, characterized in that: Before receiving the first indication information from the second terminal device, the method further includes: Sending second indication information to the second terminal device, wherein the second indication information indicates that the first terminal device has the capability of supporting the first indication information.

21. A communication device, characterized in that: The communication device includes a unit for executing the method according to any one of claims 1 to 10, or the communication device includes a unit for executing the method according to any one of claims 11 to 20.

22. A communication device, characterized in that: The method comprises a processor, wherein the processor is used to execute a computer program or instruction stored in a memory to implement the method according to any one of claims 1 to 10, or to implement the method according to any one of claims 11 to 20.

23. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 1-10 through a logic circuit or an execution instruction, or the processor is used to implement the method as described in any one of claims 11-20 through a logic circuit or an execution instruction.

24. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or an instruction. When the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 10 is executed, or the method according to any one of claims 11 to 20 is executed.

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